US3566851A - Magneto for multicylinder engines of automotive vehicles - Google Patents

Magneto for multicylinder engines of automotive vehicles Download PDF

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Publication number
US3566851A
US3566851A US800997A US3566851DA US3566851A US 3566851 A US3566851 A US 3566851A US 800997 A US800997 A US 800997A US 3566851D A US3566851D A US 3566851DA US 3566851 A US3566851 A US 3566851A
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US
United States
Prior art keywords
armatures
combination
breaker
rotor
ignition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US800997A
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English (en)
Inventor
Gustav Pfrommer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3566851A publication Critical patent/US3566851A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/48—Generators with two or more outputs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P1/00—Installations having electric ignition energy generated by magneto- or dynamo- electric generators without subsequent storage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H02K21/222—Flywheel magnetos
    • H02K21/225—Flywheel magnetos having I-shaped, E-shaped or similarly shaped armature cores

Definitions

  • Each set of breaker contacts is connected with one end of a winding in one of two armatures which are mounted on a stationary plate adjacent to the path of movement of permanent magnets.
  • the annatures overlie each other and are magnetically connected in parallel with each other.
  • the other end of each winding is connected with the ignition coil.
  • the plate carries an auxiliary armature which can supply current to the lighting system of the vehicle.
  • the present invention relates to magnetos in general, and more particularly to improvements in rotating magnet-type magnetos. Still more particularly, the invention relates to improvements in rotating magnet-type magnetos for use in connection with multicylinder internal combustion engines of automotive vehicles or the like.
  • Another object of the invention is to provide a magneto of the just described type wherein the ignition voltage is not influenced by the load on auxiliary armature or armatures.
  • a further object of the invention is to provide a magneto, particularly a rotary magnet-type magneto for use with multicylinder internal combustion engines, wherein the ignition armatures and the auxiliary armatures (if needed) are mounted in a novel and improved way so that one ignition armature can exert beneficial influence on the other ignition armature or vice versa and that the generation of ignition current is not affected by the load upon the auxiliary armature or armatures.
  • the improved magneto is particularly suited for use in connection with multicylinder internal combustion engines (for example, 2-stroke cycle 2-cylinder engines or 4-cylinder engines). It comprises stationary support means (preferably a plate or the like which can be mounted on the crankcase of the internal combustion engine), rotor means including permanent magnet means (for example, four equidistant radially magnetized permanent magnets), a pair of ignition armatures mounted on the support means adjacent to the path of movement of the permanent magnet means and magnetically connected in parallel with each other, a pair of breaker means provided on the support means and each connected with one of the armatures, each of the breaker means having an open and a closed position, and rotary cam means (preferably integral with or rigidly connected to the rotor means) for opening one of the breaker means when the other breaker means is closed, and vice versa.
  • stationary support means preferably a plate or the like which can be mounted on the crankcase of the internal combustion engine
  • rotor means including permanent magnet means (for example, four equidistant radially magnetized
  • the ignition armatures on the support means one over the other at one side of the cam means, and to mount an auxiliary armature for generation of current for the lighting system or two additional overlapping ignition armatures on the same support means substantially diametrically opposite the first-mentioned ignition armatures. If the support means carries only one pair of ignition armatures, it can support one or more auxiliary annatures each of which can furnish electrical energy to a separate consumer.
  • FIG. 1 is a plan view of a magneto for use in connection with a 2-cylinder 2-stroke cycle internal combustion engine
  • FIG. 2 is a fragmentary sectional view as seen in the direction of arrows from the line lI-II of FIG. 1.
  • a rotary magnet-type magneto which comprises a rotor 10 with four equidistant radially magnetized permanent magnets 11 and a supporting plate 12 for ignition armatures 13 (FIG. 2) which supply ignition current.
  • the plate 12 further supports a third or auxiliary armature 14 which delivers current for the lighting system, two breaker means each including a lever 15, and two capacitors 16 each in parallel with one of the breaker means.
  • the plate 12 is screwed or otherwise affixed to the crankcase (not shown) of a 2-stroke cycle 2-cylinder internal combustion engine which includes a crankshaft 17 having one of its ends connected to the hub 18 of the rotor 10.
  • This rotor constitutes a flywheel and its hub 17 constitutes a breaker cam which pivots the breaker levers 15 in response to rotation of the shaft 17 and has a closing angle of 230.
  • the breaker levers 15 are mounted on the plate 12 diametrically opposite each other with reference to the axis of the shaft 17.
  • FIG. 2 shows that the armatures 13 are mounted on the plate 12 in such a way that one thereof overlaps or overlies the other. In other words, they are magnetically connected in parallel with each other. Since the breaker levers 15 are located diametrically opposite each other, and due to the particular shape of breaker cam 18, one of the breaker means is closed when the other breaker means is open, and vice versa. When one of the breaker means is open at the moment of ignition, the magnetic flux escapes from the armature 13 which is associated with the closed breaker means into the armature 13 which is associated with the open breaker means. This contributes to an increase in ignition energy which is supplied to the aforementioned ignition coil.
  • the auxiliary armature 14 is mounted on the plate 12 diametrically opposite the ignition armatures 13. In this way, the armature 14 is magnetically uncoupled from the armatures 13. It comprises a laminated iron core 23 and the aforementioned winding 24 having two terminals 25 for connection to the lighting system and/or to other consumers of electrical energy. 1
  • the aforementioned nonillustrated ignition coil can be omitted if the armatures 13 are provided with primary and secondary windings.
  • the magneto can be modified for use in connection with 4-cylinder internal combustion engines. The armature 14 is then replaced by two additional superimposed ignition armatures 13 which are magnetically in parallel with each other. Such modified magnetos normally do not employ any auxiliary armatures.
  • a combination comprising stationary support means; rotor means including permanent magnet means; a pair of ignition armatures mounted on said support means adjacent to the path of movement of said magnet means and magnetically connected in parallel with each other, each of said armatures comprising a winding; a pair of breaker means each connected with the winding of one of said armatures and each having an open and a closed position; and rotary cam means for opening one of said breaker means when the other breaker means is closed, and vice versa.
  • said permanent magnet means comprises a plurality of equidistant radially magnetized permanent magnets.
  • cam means constitute the hub of said rotor means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
US800997A 1968-03-07 1969-02-20 Magneto for multicylinder engines of automotive vehicles Expired - Lifetime US3566851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1663168A DE1663168B2 (de) 1968-03-07 1968-03-07 Magnetzünder für Mehrzylinder-Brennkraftmaschinen, insbesondere Schwunglichtmagnetzünder

Publications (1)

Publication Number Publication Date
US3566851A true US3566851A (en) 1971-03-02

Family

ID=5685770

Family Applications (1)

Application Number Title Priority Date Filing Date
US800997A Expired - Lifetime US3566851A (en) 1968-03-07 1969-02-20 Magneto for multicylinder engines of automotive vehicles

Country Status (5)

Country Link
US (1) US3566851A (es)
DE (1) DE1663168B2 (es)
FR (1) FR1597827A (es)
GB (1) GB1258616A (es)
SE (1) SE339143B (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720195A (en) * 1970-03-13 1973-03-13 Nippon Denso Co Ignition system for multi-cylinder internal combustion engines
US3783315A (en) * 1970-11-25 1974-01-01 Hitachi Ltd Flywheel magneto having trigger generator for igniting engine
US4394973A (en) * 1980-04-03 1983-07-26 Robert Bosch Gmbh Injection valve
US6667564B1 (en) 2002-08-22 2003-12-23 Buehler Motor, Inc. Mechanically-commutated DC motor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2386925A1 (fr) * 1977-04-06 1978-11-03 Novi Pb Sa Stator multipolaire de volant magnetique
FR2506091A1 (fr) * 1981-05-14 1982-11-19 Florencio Garrido Goig Perfectionnements apportes aux stators de volants magnetiques

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1507307A (en) * 1924-09-02 chbyst
US2569461A (en) * 1946-05-23 1951-10-02 Bendix Aviat Corp Magneto
US2761996A (en) * 1956-09-04 Ignition apparatus
US2790914A (en) * 1954-09-28 1957-04-30 Bendix Aviat Corp Electrical apparatus for ignition and lighting
US2930826A (en) * 1956-09-14 1960-03-29 Bendix Aviat Corp Ignition apparatus
US3034005A (en) * 1958-09-02 1962-05-08 West Bend Co Alternating current generator and regulating system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1507307A (en) * 1924-09-02 chbyst
US2761996A (en) * 1956-09-04 Ignition apparatus
US2569461A (en) * 1946-05-23 1951-10-02 Bendix Aviat Corp Magneto
US2790914A (en) * 1954-09-28 1957-04-30 Bendix Aviat Corp Electrical apparatus for ignition and lighting
US2930826A (en) * 1956-09-14 1960-03-29 Bendix Aviat Corp Ignition apparatus
US3034005A (en) * 1958-09-02 1962-05-08 West Bend Co Alternating current generator and regulating system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720195A (en) * 1970-03-13 1973-03-13 Nippon Denso Co Ignition system for multi-cylinder internal combustion engines
US3783315A (en) * 1970-11-25 1974-01-01 Hitachi Ltd Flywheel magneto having trigger generator for igniting engine
US4394973A (en) * 1980-04-03 1983-07-26 Robert Bosch Gmbh Injection valve
US6667564B1 (en) 2002-08-22 2003-12-23 Buehler Motor, Inc. Mechanically-commutated DC motor

Also Published As

Publication number Publication date
DE1663168C3 (es) 1975-03-06
DE1663168B2 (de) 1974-07-11
DE1663168A1 (de) 1972-02-24
FR1597827A (es) 1970-06-29
SE339143B (es) 1971-09-27
GB1258616A (es) 1971-12-30

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